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2001 | Diploma in Physics, EPF Lausanne, Switzerland | 2004 | Dr. rer. nat., TU Munich | 2004 - 2006 | Postdoc, TU Munich | 2006 - 2008 | Research Position, Weierstrass Institute for Applied Analysis and Stochastics, Berlin | 2008 - 2009 | Akademischer Oberrat, University of Bonn | Since 2009 | Professor (W2), University of Bonn |
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The KPZ universality class of stochastic growth models in 1+1 dimensions consists in models with the same physical properties of the KPZ equation. Through the Feynman-Kac representation one sees that the KPZ class includes equilibrium models as directed random polymers as well. The study of special models with a determinantal structure allowed to determine the (conjectural universal) limit processes that describes the fluctuations of interfaces for KPZ models (see e.g. [1,2,3,4]). Along special space-time lines, correlations decay much more slowly than along spatial directions [5]. This property can be used to study decoupling around shocks [6]. In the last few years the number of solvable models has been extended beyond the class with determinantal correlations, leading to a number of results in agreement with the universality conjecture. For these new models, results are so-far available for one-point distributions. This is the case for the semi-discrete directed polymer [7], from which results on the distribution function of the solution of the KPZ equations are obtained [8,7].
Nevertheless, showing universality beyond integrability is still a big challenge and results are not as strong as in random matrix theory. The integrable models are an important starting point, as they could be used for perturbation theory, involving renormalization techniques. Further, if one proves universality using probabilistic argument also for non-integrable models, the identification of the limit processes goes through the solution of the integrable models. One of the major open question (regardless of the model under consideration, i.e., even for models with determinantal structure at fixed time), is the precise description of the limiting process for the time-time correlations.
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DFG Collaborative Research Center SFB 611 “Singular Phenomena and Scaling in Mathematical Models”
Principal Investigator of Project A12 “Universality of fluctuations in mathematical models of physics”
DFG Collaborative Research Center SFB 1060 “The Mathematics of Emergent Effects”
Principal Investigator of Project B04 “Random matrices and random surfaces”
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[ 1] Jinho Baik, Patrik L. Ferrari, Sandrine Péché
Limit process of stationary TASEP near the characteristic line Comm. Pure Appl. Math. , 63: (8): 1017--1070 2010 DOI: 10.1002/cpa.20316[ 2] Alexei Borodin, Patrik L. Ferrari, Tomohiro Sasamoto
Transition between {Airy_1} and {Airy_2} processes and TASEP fluctuations Comm. Pure Appl. Math. , 61: (11): 1603--1629 2008 DOI: 10.1002/cpa.20234[ 3] Alexei Borodin, Patrik L. Ferrari, Michael Prähofer, Tomohiro Sasamoto
Fluctuation properties of the TASEP with periodic initial configuration J. Stat. Phys. , 129: (5-6): 1055--1080 2007 DOI: 10.1007/s10955-007-9383-0[ 4] Patrik L. Ferrari, Herbert Spohn
Scaling limit for the space-time covariance of the stationary totally asymmetric simple exclusion process Comm. Math. Phys. , 265: (1): 1--44 2006 DOI: 10.1007/s00220-006-1549-0[ 5] Ivan Corwin, Patrik L. Ferrari, Sandrine Péché
Universality of slow decorrelation in KPZ growth Ann. Inst. Henri Poincaré Probab. Stat. , 48: (1): 134--150 2012 DOI: 10.1214/11-AIHP440[ 6] Patrik L. Ferrari, Peter Nejjar
Anomalous shock fluctuations in TASEP and last passage percolation models Probab. Theory Related Fields , 161: (1-2): 61--109 2015 DOI: 10.1007/s00440-013-0544-6[ 7] Alexei Borodin, Ivan Corwin, Patrik Ferrari
Free energy fluctuations for directed polymers in random media in 1+1 dimension Comm. Pure Appl. Math. , 67: (7): 1129--1214 2014 DOI: 10.1002/cpa.21520[ 8] Alexei Borodin, Ivan Corwin, Patrik Ferrari, Bálint Vető
Height fluctuations for the stationary KPZ equation Math. Phys. Anal. Geom. , 18: (1): Art. 20, 95 2015 DOI: 10.1007/s11040-015-9189-2[ 9] Alexei Borodin, Patrik L. Ferrari
Anisotropic growth of random surfaces in 2+1 dimensions Comm. Math. Phys. , 325: (2): 603--684 2014 DOI: 10.1007/s00220-013-1823-x[ 10] Patrik L. Ferrari, Herbert Spohn
Step fluctuations for a faceted crystal J. Statist. Phys. , 113: (1-2): 1--46 2003 DOI: 10.1023/A:1025703819894
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• Annals of Applied Probability (since 2013)
• Mathematical Physics, Analysis and Geometry (since 2013)
• Electronic Journal of Probability / Electronic Communications in Probability (since 2018)
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2001 | Award for the second best general exams average of the complete academic program at EPFL (over all departments) | 2004 | Distinction “Summa Cum Laude” for the PhD thesis | 2009 | Heinz Maier-Leibnitz Prize 2009 of the German Research Foundation (DFG) | 2018 | Alexanderson Award from the American Institute of Mathematics (AIM) |
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2008 | Lecture of 11.5h on Random Matrices and Related Problems at the Beg Rohu Summer School in Bretagne, France | 2009 | Minicourse of 4h on Dimers and orthogonal polynomials: connections with random matrices at the Workshop Dimer models and random tilings, Institut Henri Poincaré, Paris, France | 2011 | Short lecture of 6h on Random Matrices and Interacting Particle Systems at the Finnish Center of Excellence in Analysis and Dynamics Research, Helsinki, Finland | 2013 | Minicourse at the School/Workshop “Random Matrices and Growth Models”, ICTP, Trieste, Italy | 2013 | Advanced course at the Alea in Europe School, Marseille, France |
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2008 | Professor (W2), University of Bochum | 2008 | Professor (W2), University of Bonn | 2011 | Professor (W3), University of Leipzig |
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René Frings (2014): “Interlacing Patterns in Exclusion Processes and Random Matrices”
Peter Nejjar (2015): “Shock Fluctuations in KPZ Growth Models”,
now Postdoc, Institute of Science and Technology, Austria
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- Master theses: 15, currently 1
- Diplom theses: 8
- PhD theses: 2, currently 1
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